Apparatus for the extraction and recovery of volatile liquids



May 9 E. A. IRONSHDE APPARATUS FOR THE EXT MOTION AND- RECOVERY OF voafiqw LI ii'nas Filed Nov. e. 1925 Condenser Patented 'ay 31, rear.

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APPTUS FOR I! Application filed xoveinbeet, 1925, Serial No.

This invention relates to a plant or instellation for, extracting vents from gases, materials or substances of various kinds, an object of the invention being to extract or recover-more solvent than is usuallyobtained by ordinary extractors and for effecting the recovery or extraction in a better manner. v

The plant comprises any suitable form of m extracting app'aratusand the invention may be broadly described as a. combined extrac tor dsorber consistihg in combining extractor tpparatus for the extraction of added or other solvents and also for the extraction of solvents created or produced by combustion or otherwise with an adsorber containing any solid adsorbing material, e. g. activated charcoal or silica gel. wh ch in a general way comes into use after the bulk of the solvent 53" has been taken out from the extractor plant, said adsorber may efiect the final extraction or recovery by passing air 'or other gas or mixture of gases through or between the inaterial or substance and through the ad- 5 sorber after the main part or bulk of the solvent has been removed. The air or other gas or mixture of gasses may be heated if desired and may be under any suitable pressure. v

The invention can be applied to many purposes, including the treatment of town gas or coke oven gas. As an example of the invention a'p lied to the extraction of grease .from hides? construct a conventional extractor plant com rising a cylindrical or. 1 other extractor in w ich the hides arefplace'd, say by hanging them on supports, an e solvent such as petrol is introduced from a storage tank and steam from a boiler is discharged into the chamber in much the-usual manner. This effects a large extraction of the grease and the extract is conducted to a still and the solvent vapour taken to a condenser from which it passes to a decanterwhere the water and the solvent are separated, the water being led to waste and the solvent conducted back to the storage tank. With this plant I use an ,adsorber which may be connected by tubes-or equivalents to any suitable parts of the plant. These tubes may be permanently open to these parts. or valves may-be fitted by which the udsorbercan be isolated whilst the main rart of the extractor plant is in use, or the or recovering sol-.

idsorbernna'y be in action simultaneously El' ALLAN IRONEIDE, OF LONDON, ENGLAND.

TRACTION AND RECOVERY I0F lTOLA'IILE LIQUIDS.

(47,390, and in Great Britain November a, race.

with the extractor and other part of the ex tractor plant. i

The use of the adsorber enables me to obtain, either by way of recovery or extract1on,.or both,'a greater percentage of solvent so than has hitherto been possible.

For example, in addition tdthe'solvent recovered from the extractor by means of steam some solvent still remains in the hides above mentioned, and this may be driven dias root into the condenser by a suitable pipe, but in a general way there 'is still an appreciable and valuable quantity of solvent left in the hides and'to recover this I open. communication between the extractor and an adsorber of any suitable kind, and which is also connected tothe condenser, and I force air or othergas or mixture of grises into the extractor and through or amongst the hides from-whence it passes through the ad.- sorber and into the condenser.

A suitable adsorben'is that described in the specification of my British Letters Patent No. 238,984 and by which I obtain the following advantages: so

(I? The va our gas is distributed as even y as possi 1e over the exposed area of the adsorbent material.

(2) The superheated steam removing the adsorbed solvent is also distributed as evenly as as possible.

' (3) Each article of carbon is not more than a speci ed distance from the heating and cooling coils.

(4) That while allowing the gases to esso cape freely, means is taken to prevent any of the disintegrated adsorbent material from passing to the condenser.

A steam pipe orpipes can be connected to a coil (not shown) in the adsorber to-va or ize or free the adsorbed solvent whic is led away to a condenser connected toa decantor and/or the storage tank.

The pipes connecting the adsorber to the" extractor and the condenser will be fitted with valves to shut it off and open it up as required. Y

I will now erence to the accompanying diagrammaticdrawing in which the extractor 1 is'connect ed to a solvent storage tank 2 andby-a pipe 3 to a condenser 4. The condenser has a pipe 16 to the decanter 7 which is connected by pipe 8 to the solvent tank 2.

describe my invention with ref- Ii a An adsorber 9 is con'nected, by pipe 10, Z10

to the extractor and by pipe 11 to the condenser A still 12 is connected in usual manner by pipe 14 to the extractor and by'pipe' 15 to the condenser.

A steam supply is connected by pipe 13 to .a coil 17 in the extractor and the operation of the apparatus is substantially as hereinafter described.

Assuming hides areto be treated they are placed in the upper part of the extractor 1 through an opening closed by a door 1' and petrol or other suitable solvent is, introduced from the solvent tank 2 through a pipe,

' steam is also .introduced to the extractor through the pipe 13 and the process of grease extraction is then carried on. When this 0per'ation is completed theextra'ct is run off into still 12 through discharge pipe 14. In

the still the extract is heated and the solvent taken off by pipe 15 to condenser 4, from the condenser it passes to decanter 7 where the condensed water and solvent are separated. the solvent is returned again to the tank 2 by pipe 8 and the water passes to the drain.

In addition to the solvent recovered as described above, a quantity of solvent which remains in the hides when the extract is run off to the still is passed direct as vapour-by means of steam or other suitable means to the condenser 4 through the pipe 3, but there is still a fair percentage of solvent left in the hides which is recovered by the adsorber. 9 between the extractor 1 and the condenser 4. To efl'ect this recovery steam under pressure is passed. through the extractor to the adsorber where it is steamed out and taken to the condenser.

By the combined use of the adsorber and the extractor plant I am able to recover prac-v tically all'the solvent in an inexpensive manner and the hides or other materials under.

treatment are in better condition for sale or use.

The pipes are fitted with valves, indicated in the usual way on the drawving so that the required connections can be readily made and any parts of the apparatus can be shut 01f on nn ALLAN mousrbn. 

